/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.server.master.processor;

import com.google.common.base.Preconditions;
import io.netty.channel.Channel;
import org.apache.dolphinscheduler.common.enums.StateEventType;
import org.apache.dolphinscheduler.common.enums.WorkflowExecutionStatus;
import org.apache.dolphinscheduler.common.utils.JSONUtils;
import org.apache.dolphinscheduler.remote.command.Command;
import org.apache.dolphinscheduler.remote.command.CommandType;
import org.apache.dolphinscheduler.remote.command.WorkflowStateEventChangeCommand;
import org.apache.dolphinscheduler.remote.processor.NettyRequestProcessor;
import org.apache.dolphinscheduler.server.master.event.StateEvent;
import org.apache.dolphinscheduler.server.master.event.TaskStateEvent;
import org.apache.dolphinscheduler.server.master.event.WorkflowStateEvent;
import org.apache.dolphinscheduler.server.master.processor.queue.StateEventResponseService;
import org.apache.dolphinscheduler.service.utils.LoggerUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * handle state event received from master/api
 */
@Component
public class StateEventProcessor implements NettyRequestProcessor {

  private final Logger logger = LoggerFactory.getLogger(StateEventProcessor.class);

  @Autowired
  private StateEventResponseService stateEventResponseService;

  @Override
  public void process(Channel channel, Command command) {
    Preconditions.checkArgument(CommandType.STATE_EVENT_REQUEST == command.getType(),
        String.format("invalid command type: %s", command.getType()));

    WorkflowStateEventChangeCommand workflowStateEventChangeCommand =
        JSONUtils.parseObject(command.getBody(), WorkflowStateEventChangeCommand.class);
    StateEvent stateEvent;
    if (workflowStateEventChangeCommand.getDestTaskInstanceId() == 0) {
      stateEvent = createWorkflowStateEvent(workflowStateEventChangeCommand);
    } else {
      stateEvent = createTaskStateEvent(workflowStateEventChangeCommand);
    }

    try {
      LoggerUtils.setWorkflowAndTaskInstanceIDMDC(stateEvent.getProcessInstanceId(),
          stateEvent.getTaskInstanceId());

      logger.info("Received state change command, event: {}", stateEvent);
      stateEventResponseService.addStateChangeEvent(stateEvent);
    } finally {
      LoggerUtils.removeWorkflowAndTaskInstanceIdMDC();
    }

  }

  private TaskStateEvent createTaskStateEvent(WorkflowStateEventChangeCommand workflowStateEventChangeCommand) {
    return TaskStateEvent.builder()
        .processInstanceId(workflowStateEventChangeCommand.getDestProcessInstanceId())
        .taskInstanceId(workflowStateEventChangeCommand.getDestTaskInstanceId())
        .type(StateEventType.TASK_STATE_CHANGE)
        .key(workflowStateEventChangeCommand.getKey())
        .build();
  }

  private WorkflowStateEvent createWorkflowStateEvent(WorkflowStateEventChangeCommand workflowStateEventChangeCommand) {
    WorkflowExecutionStatus workflowExecutionStatus = workflowStateEventChangeCommand.getSourceStatus();
    if (workflowStateEventChangeCommand.getSourceProcessInstanceId() != workflowStateEventChangeCommand
        .getDestProcessInstanceId()) {
      workflowExecutionStatus = WorkflowExecutionStatus.RUNNING_EXECUTION;
    }
    return WorkflowStateEvent.builder()
        .processInstanceId(workflowStateEventChangeCommand.getDestProcessInstanceId())
        .type(StateEventType.PROCESS_STATE_CHANGE)
        .status(workflowExecutionStatus)
        .key(workflowStateEventChangeCommand.getKey())
        .build();
  }

}
